SAN DIEGO—The Comic-Con International conference long ago departed from catering exclusively to comic-book fans, with Hollywood movie studios flocking to the event to promote their films. This year, television is in the mix in a major way, even as Hollywood scales back its presence.

ABC pushed its new show “The Neighbors,” about aliens disguised as suburbanites, with a nearly full-scale replica of a wood-paneled home in the center of the convention floor. Young women in preppy skirts and polo shirts, one of them holding up a shiny plastic pie with a cross-hatched top, beckoned attendees to step inside the home to view a trailer for the new program.

Showtime armed fans with vibrant yellow bags promoting “Homeland,” showing the faces of the show’s two main characters, played by Claire Danes and Damien Lewis.

Across the street from the convention center, NBC took over a restaurant and street corner, wrapping the restaurant in banners for shows including “Revolution” and “Grimm.” A replica of a trailer from “Grimm” was parked outside.

While TV bumped up its presence at the conference, movie studios and Hollywood talent agencies backed off.

Three major studios–Universal Pictures, Twentieth Century Fox and Paramount Pictures–are sitting out this year’s convention. And three major talent agencies–William Morris Endeavor, ICM and UTA–are not throwing the kind of lavish parties they have in years past.

Fox is owned by News Corp. also the owner of The Wall Street Journal.

Some conference attendees said they welcomed the addition of TV shows. “I’m here for the videogames, so if it wasn’t for the diversification of Comic-Con, I wouldn’t be here at all,” said Corey Stedwell, 25 years old, who was covered in fake moss and carrying a toy rifle to impersonate a sniper from the game “Battlefield.”

But others said there was a jarring juxtaposition in tone between some of the TV programs and much of the other content being promoted. Next to the ABC booth with its peppy greeters, for example, was the Legendary Pictures booth featuring booming end-of-days-style music to accompany promotions for the upcoming film “Pacific Rim.”

“There’s a big contrast between the ‘Twilight’ movies and videogames,” said Gerardo Ramirez, 26 years old, who was dressed as Iron Man. “I think they should be a little more separated.”